Pipe-thread protector



(No Model.)

W. H. & H. W. PIOKETT.

PIPE THREAD PROTECTOR.

No. 372,328. 4 Patented Nov. 1, 1887.

INVENTOR Y JAM.

- ATTORNEYS.

ing exterior threads on the ends of pipes from proved pi pe-threadprotector as applied to use.

of such threads may be prodiiced ontbe p r0- Pipe-Thread Protector, ofwhich the following ,drawings, forming a part of this specification,

gjtudinal sectional elevation of the protector the protector, partlybroken away and in sec- D,-'to'which the protector isapplied, aspresthread l oy pressing it up by roller or other I one thread B on orinthe protecton'as shown UNITED STATES PATENT OFFICE.

WILLIAM H. PIoKErT' AND HARRY w. PIOKETT, or WARREN, PENNSYLVANIA.

PIPE-THREAD PROTECTOR.

SPECIFICATION forming part of Letters Patent No. 372,328, dated November1, 1887. Application filed February 5, 1887. Serial No. 226.703. (Nomodel.)

To an whom it may concern:

Be it known that we, \VILLIAM H. PIOKETT and HARRY W. PIoKETT, both'ofWarren, in the county of .lVarren and State of Pennsylvania, haveinvented a new and Improved is a full, .clear, and exact description.

Our invention relates to a guard for protectinjury during handling ortransportation, andhas for its object to provide asimple, inex pensive,and efficient device of this character. The invention consists incertain novel featurcs of construction of the pipe-thread protector, ashereinafter fully described and claimed. T

Referenceis to be had to the accompahying in which similar letters ofreference indicate corresponding parts in allthe'figures.

Figure 1 is a perspective View of our imon the end. of a pipe. Fig. 2 isa central lon and pipe. Fig. 3 is a cross-sectional elevation Fig. 4 isaQsideelevation of a modified form of tion. H p p We make thethread-protector A in the form of a ring or annulus, and preferably ofsheet metal, and with an inturned flange, a,at its outerend, which lapsupon theend of a pipe,

ently explained. q

On the ring-protector there is formed an internal thread, B; WVe preferto make this dies from the main body of the plateof the ring, and weformthe thread-B quite near the outer-endof the ring, or so it will screwupon or over ;buta few. threads of the pipe to whichtheprdtectorisapplied, and the body ofzthe' protectori-inside of thethread will be long enoughtoflquite snugly fit over andcompletel y coverthethreadsd on the end of the pipe D, as'showii. In practice we may formbut one continutector to engage the pipethread, or but a part of. athread may be formed on the protector, or the equivalent of a threadorpart ofa thread maybe formed on the protector by a s'eri'esof 5 5internal spirally-ranging projections, B, pro- I duced, preferably, bypressing the metal .of the protector from the outside,pand"as will beunderstood from Fig. 4' of thefdrawings and thesethread-formations Bfmay extend b;ut partly around the protectoigor more than once. aroundit, as above described for the thread'B. It is obvious that a protectorhaving ani-na ternal thread near its outer end and provided at its outerend with an inbent flangeto'over- '6 lap the end of thepipe to whichitis applied,

may-be made by casting it or spinning -it in one piece o'f'metal, but weprefer to make the protector from sheet metal ,and by the follow-g,

ing process. We first out a blank to proper 0 size, and by'using adie,either flat-faced or inroller form, we-impress the thread B or thein--' dentations 13, forming a th read,into the metal.

-We then roll'up-the metal and join-its edges, preferably by a doublehook lap-joint, G, similar to that employed in joining the seams "ofordinary stove-pipe. The end flange, a, of

the protector may be bent up either by thedie at the same time that theinternal thread is formed, or the flange may be spun or upset after theends of the metal plate are joined, as may be preferred. v.

We specify the advantagesof our improvement as follows: By forming theinternal .thread,'partial thread, or a few threads on the inside of theprotector-near its outer endit may be very much more quickly applied tothe pipe than 'is possible with protectors having screw-threads cut orproduced on them for their enti1 e"1ength, and which require to beturned upon the pipe many timesto entirely cover the pipe-thread, whilewith our device it is simply slipped bodily over the pipe-thread untilthe thread B'strikes thepipe threads, and a few turns of the protector 5suffices to hold it securelytothe pipe so it fully covers'thepipe-threads. Furthermore, the-end flange, a, formsa complete protectionto the end orfjleading'thread of the pipe, which it is most important toassure, andthe end it. flange, a, also provides, in connection with theinternal thread or threads of the protector, a

lock to the-protector on the pipe when the ticula rly valuable in aprotector having a partial or whole thread or but a few threads'near itsouter. end, and, finally, a Screw-thread.pro-

is not only very effective for its purpose, but

it may be made at a trifling cost.

Itwill be understood that we do not limit ourselves to the formation ofa partial thread, a whole thread, or two or more threads at the interiorof the protector near its outer end, as

thethread v0r threads may be formed on or pressed'intothe protector nearits inner end; but the construction with threads at or 'near its outerend is preferred, because of the ease V of application of protectors somade to the pipes, as above described. Having thus described ourinvention, wha we claim as'new, and desiret-o secure by Letters Patent,is--' I a thread or threads at its one end, while the remainder of theprotector is plain or unthreaded throughout, substantially as shown anddescribed, and for the purpose set forth.' tector made as herein,described and claimed 2 As-an improved article of manufacture, thepipe-thread protector having on its inside a thread or threads at itsone end, while the remainder of the protector is plain ,or unthreadedthroughout, said threaded end of the protector also having an inbentflange adapted to cover the end of a pipe, substantially as 35 shown anddescribed, and for the purpose set forth. 4

w. H. PICKETT. HARRY w. PIOKETI.

